Device for preforming corrugated material for lamp shades



2,579,171 DEVICE FOR PREFORMING CORRUGATED MATERIAL FOR LAMP HADEs Filed Oct. 11, 1949 A. H. VBIEN Dec. 18, 1951.

2 SHEETS- SHEET 2 INVENTOR M4557??- H. Elf/V,

ATTORN Patented Dec. 18, 195i UNITED STAT DEVICE FOR PREFORMING CORRUGATED MATERIAL FOR LAMP SHADES Albert H. Bien, Wynnewood, Pa.. Application October 11, 1949, Serial No.'120,636

(Cl.'931) f 2 Claims.

. The present invention relates to the manufacture of lamp shades and more particularly to a device for preforming corrugated material ready for shaping about a lamp shade frame. Y

In the manufacture of lamp shades made of corrugated or flutedpaper or like material, there has been heretofore a problem as to how to reshape and bend the corrugations so that the finished shade can be fitted about its frame without exposing broken corrugations and generally producing an unsightly effect. To overcome this disadvantagein manufactureit has been proposed to transversely slit or cut away thecorrugations on a line of bend and use a tiev string or cord to maintain the assembly. Such attempts have failed to solve the problem and have so weakened the material that the shade is lacking the durable characteristics of this type of article.

Some of the objects of the present invention are: to provide a novel means for preforming corrugated material in the manufacture of paper or like lamp shades; to provide a device for defining a line of bond in corrugated material which in assembled condition of the lamp shade exposes no unsightly changes in the flutes of the corrugations; to provide a device where a length of corrugated material can be effectively scored and bent along a predeterminedly located line without damaging the appearance of the material; to provide a device which simultaneously serves as a gauge for defining the width of the neck or collar of a lamp shade, and as a scoring and bending medium; and to provide other improvements as will appear hereinafter. In the accompanying drawings, Fig.- 1 represents a plan of a combined gauge, bending and scoring device; Fig. 2 represents a section on line 2-2 of Fig. 1; Fig. 3 represents a perspective of the device showing the placing of material for the scoring and bending operation; Fig. 4 represents a perspective of the device showing the carrying out of th scoring and bending operation; Fig. 5 represents a section of the material for a lamp shade prior to operation by the device; Fig. 6 represents a section of the material after operation by the device taken on the line 6-6 of Fig. 7; Fig. 7 represents a front elevation of the material after operation of the machine; Fig. 8 represents the completed material mounted to form a lamp shade; and Fig. 9 is a section longitudinall of the scored corrugation taken on the line 9-9 of Fig. 7.

Referring to the drawings, one form of the present invention comprises a device shown in Figs. 1 to} for linear scoring and bending a length of corrugated paper Ill or other material suitablefor use in making lamp shades. In the preferred form of the invention, the device come prises a fiat metal bed plate I 1 arranged for sup;

port on a table to lie in a horizontal plane as a support for such a length of corrugated paper vas will form a lamp shade when its ends are brought together. and fastened as a tubular assembly- Lamp shades of this character are designed to fit" about a wire skeleton frame having a small di? ameter ring at the top and alarge diamete'rfringl at the bottom. The'shade to which thepresent invention relates is to have the appearance oftwo truncated cones arranged in superposed relation. with ends meeting in a common plane just be low thetop small diameter ring, so that the lat' ter is concealed within the relatively short collar formed by the upper truncated cone, and which. latter is held in shape by the aforesaid top frame ring. The problem which has been solved by the present invention was how to line score and bend a length of corrugated paper so'that the mate rial couldbe bent along the scoring line to'fias sume'the desired outwardly flaring collar. I

As' a'means for forming a straight edge'for defining the score and bending line, a hold-down platelZ hinged at I3 to the'front'ed'ge "of the bed plate H so that it can be raised to permit placing of the length of material which has been cut to the predetermined necessary length'fora' particular size of'l'amp shade. The width of the hold-down plate I2 is such as will cover the body of the; material ,while leaving an end portion thereof 'of predetermined width exposed beyond the straight edge ofvthe plate l2. Handles M are attached to the hold-down plate It" for proper material control thereof.

'In order. to score'and'b'end the corrugated ma.- teri'al along the line defined by. the straight'edge of thehold-dOWn plate l2; a bending strip/l5 is hingedat 'lfi't'o' the top of the bed plate IT in such close proximity to the straight edge of the hold-down plate i2 as will locate a long edge of the strip l5 parallel to and substantially abutting the edgeof the plate l2. When the strip I5 is in its initial or inoperative position, it lies in the same horizontal plane as the plate I2.

For the purpose of gauging the width of the material for the lamp shade collar, a fiat strip gauge member I1 is adjustably mounted for sliding movement upon the strip I5 towards and away from the straight edge of the plate 12, and with which it has parallel relation. The spacing between the member I! and the plate l2 determines the selected width of the collar to be formed. This adjustment takes place through the provision of slots I8 in the member H, the axes of which are respectively perpendicular to the straight edge of the plate 12. Bolts 29 fixed to the gauge member I! project respectively through the slots l8 to receive wing nuts 2| or other position-locking means. Thus, by loosening the wing nuts 21 the gauge member 11 can be moved to provide a predetermined space between it and the straight edge of the plate 12, the spacing defining exactly the width of the collar for the; particular shade being made. A handle 22 is fixed to the face of the gauge member I! for grasping and lifting. H V

In operation the gauge member I! is firstset for the selected collar width and then fixed inplac'e l 'Ifhe operator now raises the hold-down plate 2 to expose the face ofthe bed plate [Land places: a

length of the corrugated material flat on the bed plate while at the same time moving it f'orw'ard' to-bring its outer edge in contact with the set face or the gauge member IT. The hold-down plate I t is v now lowered and pressed into clamping relation with the-body of the material, thereby defining a clean-cut line along the upper face of the'material; While so held, the operator grasps the handle 22 and lifts the strip I5 to a substantially vertical position, whereby the exposed collar portion of the material follows the aforesaid movement and is scored as it turns about the straight edge of the plate l2 in the bending operation. With the linear bend line now properly formed, the length of material is removed from the machine and 'itstwo ends then overflapped and sealed together by any suitable adhesive. The tubular shade can now be fitted about the skeleton frame with the bend'line' coinciding with the upper frame ring where it is'made fast by a ribbon or other decorative tape; When thus mounted, the contour of the shade is that of two truncated cones, one being superposed upon the other in inverted position so that the neck and body of the shade flare outwardly from the meeting line in pleasing symmetry.

By, reference to Figs. '7 and 8, the novel result accomplished by the device will be evident and it should be noted that the corrugated ribsat one face of the material are each scored inwardly, as shown atfl23, and thereby, producetransvers'e I'- shaped projections acting, as reinforcement between the respective ribs of the opposite face of the material; N

It will now be apparent that a complete unitary device has been devised for preparing a length of corrugated material for shaping into a lamp shade byiso scoring and bending the material that a neck portion of predetermined width is provided without leaving unsightly slots or broken corrugations, and which is readily mounted on a frame of the usual shape. In the foregoing description the use of the term score is used in the sense of notches as distinguished from cuts or slits.

Having thus described my invention, I claim:

1. In a device of the character described, a fixed support, a hold-down plate hinged to said support to move towards and away from the exposed face of said support and providing a space between said support ands'aid face to receive a portion of the width of a length of corrugated material, the corrugations thereof being perpendicular to the free edge of said plate, a bending strip hinged to said support in close proximity to said edge to seat under the projecting width of said material to be bent along the line of said free edge, handle means on said plate for lifting said plate while said material is placed thereunder, handle means on said strip to line score and bend said material along the free edge of said plate, and a gauge member mounted on said strip to define the width of the projecting portion of said material.

2. In a device of the character described, a fixed support, a hold-down plate hinged to said support to move towards and away from thee'xposed face of said support and providing a space between said support and said face to receivea portion of the width of a length of corrugated material, the corrugations thereof being perpendicular to the-freeedge of said plate, a bend- 'ing strip hinged to said support in close proximity REFERENCES CITED I he following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date v Re. 31547 Collin 1;- July 13; 1869 49,736 Ellis Sept. 5', 1-865 101,299 M0fiatt' Mar; 29, 1870 246,736 Dunn Sept. 6,1881 7 561,814 Remus June 9, 1896 1;11L7'Z9 Glaze Apr; 4, 1922 2,127,119 Howard Aug, 16, 1938 2,264,255 1 Burke: l Nov, 25, 1941* 2,269,128 Ross 1- Jan. 6, 1942 2,404,162 Brown; July 16, 19456 

